1920年以后，德国合成硝酸盐给了智利硝石开采当头一棒。
German synthetic nitrates knocked out Chilean nitrate mining after 1920 .
英国不允许，智利把硝石卖给德国。
Well , the British didn 't let Chile sell saltpeter to Germany .
从智利的硝石矿里。
From saltpeter mines in Chile .
智利硝石智利硝石智利硝石